Schorl and Rock Crystal Optical Properties

Schorl

Rock Crystal

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1 Optical Properties

1.1 Luster

Vitreous

Not Available

1.2 Pleochroism

Very strong: yellow-brown pale yellow

AbsentWalter Schumann

1.3 Dispersion

NA0.01

0.007 1

1.4 Transparency

Transparent, Translucent

TransparentWalter Schumann, Gemstones of the world (2001) More from other references

1.5 Refractive Index

1.635-1.6721.544-1.553

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Not Available

1.8 Birefringence

0.0250.009

0 0.296

1.9 Clarity

Transparent

TransparentWalter Schumann

Schorl and Rock Crystal Optic Character

Schorl and Rock Crystal optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Schorl and Rock Crystal Physical Properties like crystallographic symmetry, pleochroism,etc. in the crystal. Some of the optical properties are refractive index, luster, optic character, pleochroism etc. Prominent among these is Schorl and Rock Crystal optic character. You might have noticed your gemologist rotating the gemstone while testing it. Rotating a gemstone along its optic axis helps in determining its optic character.

Compare Black Gemstones

Schorl Vs Snowflake Obsidian

Schorl Vs Triplite

Schorl Vs Xenotime

Schorl and Rock Crystal Transparency

Similar to their colors, Schorl and Rock Crystal transparency can also be used as criteria for their primary identification. Although transparency cannot be the only criteria for gemstone identification, it can efficiently used in gemstone grading. Talking about their transparency, Schorl is Translucent and Transparent while Schorl is Translucent and Transparent in appearance.